The bridging role of belief in a just world in the culture‐psych loop

Beliefs, which are deeply shaped by cultural norms, play a central role in well-being, with belief in a just world (BJW) serving as a vital psychological resource. Yet, it remains unclear how cultural norms shape such beliefs and, in turn, influence emotional and psychosocial well-being. Across four studies (N = 2324), we examined the interplay among cultural tightness, BJW and well-being using surveys, cultural priming and longitudinal designs. Studies 1a-1d showed that BJW mediated the relationship between perceived tightness and well-being across different cultures and time periods. Studies 2a-2c provided causal evidence that tight (vs. loose) priming enhanced well-being through increased BJW. Study 3a revealed a sequential pathway from perceived tightness to personal BJW, to general BJW and finally to well-being. Study 3b, using a longitudinal design, revealed that personal BJW was more flexible and responsive to change, whereas general BJW was more stable and predictive of psychosocial well-being. Together, these findings highlight a dynamic pathway linking culture, belief and well-being, offering new theoretical and empirical insights into the role of BJW in supporting emotional and psychological well-being across ecologically and culturally diverse settings.